IloveManUtd
New member
- Joined
- Jul 27, 2010
- Messages
- 48
.....99% has been "said" and 1% (if lucky!) has been done :roll:BigGlenntheHeavy said:\(\displaystyle After \ all \ is \ said \ and \ done, \ .......\)
mmm4444bot said:Going by the diagram, you could use the Law of Cosines to find AC.
Then, the Law of Sines to find angle BAC.
Well, I sure wish he'd start using ANGLES instead of "bearings" :shock:mmm4444bot said:I'm thinking that the original poster's source does not use compass designators, when stating bearings. In this case, all bearings are stated as measured clockwise from an initial ray that points due north.
IloveManUtd said:I've found length AC = 126.6228m, angle BAC = 34.9320[sup:ko21ij7t]o[/sup:ko21ij7t]. I fixed your round-off error, by rounding to four digits.
You get round-off error, when you don't carry enough digits from one calculation to the next. Don't round intermediary results; let your calculator carry all of its digits to the next calculation. Round the final result.
I'm having trouble finding the angles of the upper triangle.
First, find angle ADC. You've got all three sides; use the Law of Cosines.
Then use the Law of Sines to find CAD.
The sum 90-degrees + CAD + CAB is the bearing of B from A.